package com.css.zfzx.sjcj.common.utils;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;

/**
 * @author leon
 * @Title:
 * @Description:文件压缩工具类
 * @date 2020/8/10 17:01
 */
public class ZipUtils {

    private static Logger logger = LoggerFactory.getLogger(ZipUtils.class);

    private ZipUtils() {
    }

    public static void doCompress(String srcFile, String zipFile) throws IOException {
        doCompress(new File(srcFile), new File(zipFile));
    }

    /**
     * 文件压缩
     *
     * @param srcFile 目录或者单个文件
     * @param zipFile 压缩后的ZIP文件
     */
    public static void doCompress(File srcFile, File zipFile) throws IOException {
        ZipOutputStream out = null;
        try {
            out = new ZipOutputStream(new FileOutputStream(zipFile));
            doCompress(srcFile, out);
        } catch (Exception e) {
            throw e;
        } finally {
            out.close();//记得关闭资源
        }
    }

    public static void doCompress(String filelName, ZipOutputStream out) throws IOException {
        doCompress(new File(filelName), out);
    }

    public static void doCompress(File file, ZipOutputStream out) throws IOException {
        doCompress(file, out, "");
    }

    public static void doCompress(File inFile, ZipOutputStream out, String dir) throws IOException {
        if (inFile.isDirectory()) {
            File[] files = inFile.listFiles();
            if (files != null && files.length > 0) {
                for (File file : files) {
                    String name = inFile.getName();
                    if (!"".equals(dir)) {
                        name = dir + "/" + name;
                    }
                    ZipUtils.doCompress(file, out, name);
                }
            }
        } else {
            ZipUtils.doZip(inFile, out, dir);
        }
    }

    public static void doZip(File inFile, ZipOutputStream out, String dir) throws IOException {
        String entryName = null;
        if (!"".equals(dir)) {
            entryName = dir + "/" + inFile.getName();
        } else {
            entryName = inFile.getName();
        }
        ZipEntry entry = new ZipEntry(entryName);
        // 支持中文
        out.setEncoding("GBK");
        out.putNextEntry(entry);

        int len = 0;
        byte[] buffer = new byte[1024];
        FileInputStream fis = new FileInputStream(inFile);
        while ((len = fis.read(buffer)) > 0) {
            out.write(buffer, 0, len);
            out.flush();
        }
        out.closeEntry();
        fis.close();
    }

    public static void doZip(InputStream in, ZipOutputStream out, String entryName) throws IOException {
        logger.info("---添加InputStream到压缩文件，InputStream大小：{}", in.available());
        ZipEntry entry = new ZipEntry(entryName);
        out.setEncoding("GBK");
        out.putNextEntry(entry);
        int len = 0;
        byte[] buffer = new byte[1024 * 5];
        while ((len = in.read(buffer)) > 0) {
            out.write(buffer, 0, len);
            out.flush();
        }
        out.closeEntry();
        in.close();
    }

    public static void main(String[] args) throws IOException {
        doCompress("E:/view/", "D:/附件.zip");
    }

}
